Video chat startup Tango just can’t stop innovating. After recently launching the first Windows Phone video chat app, Tango is now gearing up to offer video messages, making it one of the first such services to offer a video equivalent to voicemail.

YouMail, a startup that provides next-generation voicemail services like visual voicemail, voice-to-text transcription, and custom greetings, announced today that it has reached a new milestone with 15 million unique monthly callers.

VoiceBase is one of 70 companies chosen by VentureBeat to launch at the DEMO Fall 2010 event taking place this week. These companies do pay a fee to present, but our coverage of them remains objective.